Pneumatic and Electronic Controls - Yaskawa
We provide various products, including valves, motion control, electrical enclosures, HMIs, power tools, and electric control systems. In addition to these products, we offer compressed air products to power pneuma...
Variable Frequency Drives (VFDs) are electronic devices used to control the speed and torque of electric motors by varying the frequency and voltage of the supplied power. They are widely used in industrial and commercial applications to optimize energy consumption, improve motor control, and enhance system performance. VFDs enable precise speed control, soft starting, and acceleration, reducing mechanical stress and energy waste. They provide flexibility in adjusting motor speed to match specific process requirements, resulting in energy savings and increased efficiency. With features like built-in protection, advanced control algorithms, and communication capabilities, VFDs offer reliable and efficient motor control solutions for various applications.
Related categories: Motor Control | Configured Drives / Control Systems | Line Reactors and Output Filters | DC Drives | Overload Relays
Variable frequency drives are great for motor control, but they can send harmonics back into your power system and voltage spikes out to the motor. Line reactors and output filters handle both problems, protecting the drive, the motor and other equipment on the same supply.
Products Available
- Input line reactors – reduce harmonics and protect drives from line spikes
- Output load reactors – limit dV/dt stress on motor insulation
- dV/dt filters – protect motors on longer cable runs
- Sine wave filters – deliver near-sinusoidal output for very long leads or older motors
- Harmonic filters – help meet IEEE 519 limits
Sizing Guidance
Size reactors and filters to the drive's current rating and voltage. Impedance is typically 3% or 5% for reactors. Cable length between the drive and motor is a key factor for output filters. Check the drive manufacturer's recommendations.
Centro can help you choose the right reactor or filter to protect your drives and motors.
Related categories: Motor Control | Variable Frequency Drives | Overload Relays | Configured Drives / Control Systems | DC Drives
Motor control parts keep starters, drives and control panels running. Replacement coils, contacts, overload heaters and accessories restore equipment quickly and cut downtime.
Parts Available
- Replacement coils – contactor and starter coils
- Contact kits – restore worn contacts
- Overload heaters and relays – motor protection
- Auxiliary contacts – add control functions
- Drive fans and parts – drive maintenance
Ordering Parts
Have the manufacturer, model and series of your equipment ready. Some older equipment may need cross-reference or retrofit options.
Centro supplies motor control parts and cross-references.
Related categories: Motor Control | Drive Communication | Soft Starters | Contactor Accessories | Control Relays
Braking resistors and regenerative converters handle the energy motors produce when they slow down or lower loads. They prevent drive overvoltage trips and allow faster stopping.
Products Available
- Braking resistors – dissipate energy as heat
- Braking choppers – control resistor switching
- Regenerative converters – return energy to the supply
- Enclosed resistor banks – safe installation
Choosing a Solution
Size by braking power and duty cycle. Regenerative units save energy on frequent braking applications such as cranes and elevators.
Centro supplies braking resistors and regenerative converters for drives.
Related categories: Motor Control | Universal Motor Controller | EMC Filters | Phase Converters | Contactor Accessories
EMC filters reduce electrical noise created by VFDs, servo drives and power electronics. They help equipment meet electromagnetic compatibility standards and prevent interference with nearby devices.
EMC Filter Types
- Input line filters – reduce conducted emissions
- Footprint filters – mount under drives
- Single and three-phase filters – suit supply
- Low leakage filters – reduce nuisance tripping
Choosing a Filter
Size by current and voltage, and confirm compatibility with the drive. Follow proper grounding and shielded cable practices.
Centro supplies EMC filters for drives and electronics.
Related categories: Motor Control | Braking Resistors and Regenerative Converters | Contactor Accessories | Universal Motor Controller | Drive Communication
Drive communication modules connect VFDs and servo drives to industrial networks, so PLCs can control drives, read diagnostics and change parameters remotely.
Communication Options
- EtherNet/IP – Rockwell-based systems
- PROFINET and PROFIBUS – Siemens-based systems
- Modbus RTU and TCP – broadly supported
- EtherCAT – high-performance motion
- BACnet – building automation
Choosing a Module
Match the module to your drive model and network protocol, then confirm firmware compatibility.
Centro supplies drive communication modules.
Related categories: Motor Control | Contactor Accessories | Motor Control Parts | EMC Filters | Soft Starters
Fuses provide fast, dependable overcurrent protection for circuits, motors, drives and electronics. Their high interrupting ratings make them ideal where fault currents are high.
Fuse Types
- Class CC, J and RK fuses – branch circuit protection
- Time-delay fuses – motor inrush tolerance
- Fast-acting fuses – electronics protection
- Semiconductor fuses – drives and rectifiers
- Midget and glass fuses – control circuits
Choosing a Fuse
Match class, amperage, voltage and interrupting rating to the circuit and fuse holder. Use time-delay fuses for motors and fast-acting fuses for semiconductors.
Centro carries fuses for industrial and commercial electrical systems.
Related categories: Circuit Protection | Fuse Blocks and Holders | Circuit Breakers | Disconnect Switches | Breaker Conversion Kits
Phase converters let you run three-phase motors and equipment where only single-phase power is available. They're a cost-effective alternative to bringing in three-phase service for shops, farms and remote sites.
Converter Types
- Rotary phase converters – run multiple motors and heavy loads
- Static phase converters – economical for single motors
- Digital phase converters – balanced, clean output
- VFDs with single-phase input – speed control plus conversion
Choosing a Converter
Size by total horsepower, the largest motor's starting load and the type of equipment. CNC machines and sensitive loads need balanced output.
Centro supplies phase converters for three-phase equipment on single-phase power.
Related categories: Motor Control | Motor Starters | Universal Motor Controller | Braking Resistors and Regenerative Converters | EMC Filters
Fuse blocks and holders mount fuses securely and safely in panels and equipment. Finger-safe designs and indicators make maintenance safer and quicker.
Fuse Block Types
- DIN rail fuse holders – compact control panel mounting
- Panel-mount fuse blocks – power distribution
- Finger-safe holders – reduce shock hazards
- Indicating holders – show blown fuses
- Inline holders – wire-mounted protection
Choosing a Holder
Match fuse class, size, amperage, voltage and number of poles. Check UL ratings and wire range. Indicating holders cut troubleshooting time.
Centro supplies fuse blocks and holders for control panels.
Related categories: Circuit Protection | Disconnect Switches | Fuses | Circuit Monitoring | Circuit Breakers
Centro carries VFDs, soft starters, contactors, overload relays and motor control accessories from leading brands to build or repair motor control panels. Industrial motor controllers are devices that regulate the speed and torque of an electric motor. VFDs control the speed of an AC induction motor's speed by varying the power supply frequency. DC drives do the same thing but for DC motors. On the other hand, soft starters gradually ramp the voltage to an electric motor to avoid mechanical stress and electrical damage that can occur when starting a motor from a dead stop. Industrial motor controllers are used in various applications where precise control of an electric motor is required, such as in pumps, fans, compressors, conveyors, and machine tools. Motor control products we carry include contactors, variable frequency drives, DC drives, and soft starters. These products are available in various sizes and configurations to suit any application. Whether you need a simple contactor for a small motor or a complex multi-drive system for an extensive industrial process, we have the products you need to get the job done. Please browse our website to learn more.
Shop by type: Overload Relays | Line Reactors and Output Filters | Variable Frequency Drives | Configured Drives / Control Systems | DC Drives | Manual Starters | Contactors | Control Relays
Related categories: Pneumatic and Electronic Controls | PLCs/Smart Relays | Enclosures | Circuit Protection | Pneumatic Cylinders and Actuators
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$123.84$197.00
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$123.84$197.00
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- Selecting the right pneumatic cylinder starts with defining the four core parameters of your application. Define four core parameters: bore size (force output = pressure × piston area, plus a 25–50% safety factor), stroke length (match to required travel, avoid excess), mounting style (fixed, flange, or pivot to suit your mechanical arrangement), and environment (standard, washdown, or food-grade seals). Speed is controlled by external flow valves, not cylinder selection. For precise positioning, consider a guided or rodless cylinder with position sensing rather than a standard unit.
- A soft starter ramps voltage at startup to limit inrush current and reduce mechanical shock, then steps aside once the motor reaches full speed. Use one when smooth starting is your only requirement. A VFD controls motor speed continuously throughout operation, making it the right choice whenever the process needs variable speed — conveyors, pumps, fans — and it delivers significant energy savings in centrifugal applications. If you only need a gentle start, use a soft starter. If you need speed control at any point during operation, invest in a VFD.
- PLCs are purpose-built for industrial environments — they tolerate heat, vibration, and electrical noise while executing control logic in deterministic millisecond scan cycles. They replace hardwired relay logic with reprogrammable software, making process changes fast and inexpensive. Built-in diagnostics centralize fault visibility and cut troubleshooting time. Modern PLCs integrate with HMIs, SCADA, and enterprise networks via standard protocols, enabling real-time data collection. Modular architecture means the system scales as the application grows.
- Start with the NEMA or IP rating: NEMA 1 for basic indoor use, NEMA 4/4X for washdown and outdoor exposure (4X adds corrosion resistance), NEMA 7/9 for hazardous classified locations. Size the enclosure with 20–30% spare interior space for future additions and adequate heat dissipation. Choose material based on environment — painted steel for standard indoor use, stainless for washdown or chemical exposure, fiberglass for highly corrosive areas. Verify any required certifications (UL, CSA, ATEX) before specifying.
- Solenoid valves are electrically actuated and can be triggered instantly by a PLC or control system, making them essential for automated, repeatable, or high-cycle applications. Manual directional control valves require a person to physically shift the valve and are appropriate for infrequent operations, manual overrides, or applications with no control system. In practice, most automated systems use solenoid valves for normal operation with a manual override built in for setup, maintenance, and emergency use. If the valve must respond to a signal, cycle repeatedly, or operate unattended, solenoid is the correct choice.